I don't think there are any specific hours an employ is required to work to get an E2 visa - I think that's up to the sponsor. I think it would be between the employer and employee. I'd post it over at the immigation website ... (though they'll probably tell you to come and look here for the answer ). Here's a link for you http://www.moj.go.kr/immi/08_english/01_introduction/civil_f.html